During its "Think Beyond" WebOS event, HP made sure that it talks a lot about its Touchstone, and all the newely announced devices will support it. We must say that, for now, it does look pretty good and certainly has potential.
For non, HP is only showing the touch-to-share URL transfer between the Pre 3 and the Touchpad, but we are certain that HP will come up with a handful of similar task once these devices hit the market. Of course, contact and e-mail syncing will certainly be our favorite. The good side is that HP is telling that you don't actually need to have Touchstone support to work as the devices only have to be compatible and paired.
Of course, Touchstone will also be used for charging via Touchstone dock. It certainly does look interesting and works both ways so hopefully we'll see more of the Touchstone related stuff in future.
You can check out the touch-to-share feature hands-on over at Engadget.